Antioxidant activity and HPLC analysis of polyphenol-enriched extracts from industrial apple pomace

被引:65
作者
Bai, Xuelian [1 ]
Zhang, Huawei [2 ]
Ren, Shuang [3 ]
机构
[1] Northwest A&F Univ, Coll Food Sci, Yangling 712100, Peoples R China
[2] Zhejiang Univ Technol, Sch Pharmaceut Sci, Hangzhou 310014, Zhejiang, Peoples R China
[3] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Peoples R China
关键词
apple pomace; polyphenol; antioxidant activity; HPLC; SUBSTRATE; PHENOLICS; PRODUCTS;
D O I
10.1002/jsfa.6066
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
BACKGROUND Phenolic compounds are the predominant ingredients in apple pomace. However, polyphenols from industrial apple pomace, which usually consists of several cultivars, have not been studied in detail. The present work focused on the antioxidant assay and HPLC analysis of polyphenol-enriched extracts from industrial apple pomace. RESULTS Six fractions of apple polyphenols, API to APVI, were acquired through extraction and purification using absorbent macroporous resin. Fraction APIII, eluted by 40% aqueous ethanol, had the highest content of total phenolics (1.48 +/- 0.03 g gallic acid equivalents g-1 dry apple pomace), which consisted of chlorogenic acid, caffeic acid, syrigin, procyanidin B2, (-)-epicatechin, cinnamic acid, coumaric acid and quercetin. Antioxidant assays showed that APIII had the strongest antioxidant activity of DPPH radical scavenging rate (90.96%+/- 10.23%), ABTS radical inhibition rate (89.78%+/- 6.54%) and the strongest reducing power (8.30 +/- 0.71 mu mol Trolox equivalents kg-1 dry apple pomace). It also indicated that procyanidin B2, chlorogenic acid, (-)-epicatechin and quercetin had stronger antioxidant capacity than other phenols. CONCLUSION Our data suggested that extracts from industrial apple pomace were rich in phenols and exhibited potent antioxidant activity. Extraction of polyphenols from industrial apple pomace would bring a great benefit and improve development of apple juice and cider industries. (c) 2013 Society of Chemical Industry
引用
收藏
页码:2502 / 2506
页数:5
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